Two-Dimensional MnO2/reduced Graphene Oxide Nanosheet as a High-Capacity and High-Rate Cathode for Lithium-Ion Batteries

Tong Chen
2018 International Journal of Electrochemical Science  
Two-dimensional MnO 2 /rGO nanocomposite has been synthesized by a facile wet chemical method at low temperature. Ultrathin layered MnO 2 nanosheets were well-dispersed and tightly attached on the surface of reduced graphene oxide (rGO) sheets. Owing to a special laminar structure and higher electrical conductivity of rGO, the lithium ion diffusion and the electronic transport into the MnO 2 /rGO nanocomposites were increased, resulting in improved electrochemical performance as a cathode
more » ... al in lithium-ion batteries. The first discharge-specific capacity of the layered MnO 2 /rGO nanocomposites is 279.7mAh g -1 and maintains at 242mAh g -1 after 60 cycles at 0.1C. And the rate capability of MnO 2 /rGO nanocomposites is 236.9, 230.2, 190.3, 159.7 and 121.4mAh g -1 at 0.1C, 0.2C, 0.5C, 1C and 2C, respectively. The excellent electrochemical performances highlight the two-dimensional layered MnO 2 /rGO nanocomposites as a potential cathode material of lithium-ion batteries.
doi:10.20964/2018.09.60 fatcat:2dsdlrfdprfillpyev7uwa63d4